Grease-gun



. 0. S. NEWTON.

GREASE GUN.

APPLICATION FILED JAN. 10, 1919.

Patented Aug. 9, 19211.

anvawlioz NET OTIS S. NEWTON, OF COLUMBUS, OHIO.

GREASE-GUN.

ssacas.

Specification of Letters Patent.

Patented Au 9, 1921.

Application filed January 10, 1919. Serial No. 270,479.

To all whom it may concern:

Be it known that OTIS S. NEWTON, a citizen of theUnited States, residing at Columbus, in the county of Franklin and State of Ohio, has invented certain new and useful Tmprovements in Grease-Guns, of which the following is a specification.

This invention relates to grease guns and is particularly designed to prevent wastage or undue loss of grease during the operation of injecting this grease to whatever parts it is desired to lubricate. Vell known structures now in general use are of such form that the operator or attendant may very readily cause a wastage if desired, the amount of grease injected depending upon the will and skill of the operator. My present invention is so designed that the amount of grease injected is in no wise dependent upon the skill of the operator, this being taken care of automatically and all that the operator is called upon to perform is to suit ably adjust the gun in connection with the parts to be lubricated.

With this end in View, my invention resides in the combination of a nozzle and barrel portion telescopically arranged with respect to each other iii-combination with a suitable valve structure between these parts arranged to regulate the flow of grease therethrough, and especially to prevent the flow of grease therethrough when the gun is not in use.

Further objects of my invention will become more apparent after the following detail description of the accompanying sheet of drawings in which similar characters of reference designate corresponding parts and in which,

Figure 1 is a longitudinal section taken through one type of gun embodying the principles of my invention,

Fig. 2 is a cross section taken on line 22 of Fig. 1, and

Fig. 3 is a cross section taken on line 33 of Fig. 1.

In these drawings, the gun is shown as comprising a main body formed of a nozzle section 1 and a barrel section 2, the parts being arranged to be telescopic with respect to each other as is shown. The outer end of the barrel portion 2 is provided with rolls or corrugations 3 by means of which a hose or flexible tubing may be readily attached, this flexible tubing in turn leading to a suitable supply of grease. It is intended that this grease will flow into the barrel either by means of its own head or by suitable fluid pressure as may be desired. From this, it follows that the interior of the barrel 2'is normally filled to capacity. The opposite end of this barrel is provided with a closure of'the type shown at 4, this closure being complete except for the valve opening 5 passing centrally therethrough. The outer end of the nozzle 1 is provided with a center orifice 6 and is also of conical form as shown at 7 to readily adjust itself to various sizes of openings into which the gun may be laced. By means of this conical portion, a tight seal between the gun and the part to be lubricated may be readily effected by pressure between parts and also, because of the conical head, the gun will readily adjust itself in sealed relation with openings varying considerably in diameter. The interior of the nozzle 1 is provided with a spanner member 8 removably secured in position by means of the screws shown at 9. This spanner member is also provided with a central aperture 10 designed to suitably receive the valve stem 11 in proper holding relation. This is practically effected by means of the nut 12 and the shoulder 13. The opposite end of the valve stem 11 carries a valve head 14 designed to seat itself in closing relation with the valve opening 5. Also, there is operatively located between the spanner member 8 and the closed end 4 of the barrel a spring of the type illustrated at 15. This spring is placed in position under tension so as to normally urge the barrel and nozzle portions apart and in so doing, it performs the auxiliary function of holding the valve head 14 against its seat. In fact, the amount of separating movement between the parts 1 and 2 is limited by the engagement of the valve head with its seat.

In operation, it being assumed that the barrel 2 is in proper communication with a suitable supply of grease, the nozzle portion 1 and particularly its conical end 7 is brought into proper relation with a grease opening. By properly centering this conical portion, the nozzle may be brought into sealing relation with the part to be lubricated and additional pressure against the gun from its barrel end causes the spring 15 to be compressed thus unseating the valve head 14 and permitting the flow of grease therethrough. When the part to be filled has been filled to its capacity, its wastage or leakage 'is impossible because of the sealing engagement between this part and the conical nozzle end. In this mann'eiuexcess flow is prevented and the amount which is confined within the nozzle portion will remain so confined because the closing movement between the parts land 2. also effects the closure of said member having a restricted valve opencal discharge end which is positioned in c ing formed .in its outlet extremity, a nozzle section 'slidably carried by the outlet extremity of said barrel member, said section being formed to include an orificed or conispaced relationship from the outlet extremity of said barrel member, a spanner element rigidly positioned Within said nozzle section and located intermediately of the discharge ends of said barrel; member and nozzle section, a valve stem rigidly connected with said spanner element and arranged to pro ject through the outlet opening of said barrel member, a valve formed with said stem and arranged to control the flow of a "lubricant through said opening, and a spring acting between saidspanner element and thejdi'scharge ,end of said barrel member and nor- 1 mally servlng to malntaln sald vvalve 1n such position as to obstructthe flow of lubricant through said opening.

' In testimony whereof I afiix my signature.

9. S. NEWTON. 

